knowlbs



(No Model.) 3 Sheets-Sheet 1-,

L. J, KNOWLES.

- LOOM.

No. 274,502. Patented Mar. 2? 1883.

TIESSES,

(N0 Model.) 3 Sheets-Sheet 2.

L. J. KNOWLES.

Loom. No. 274,502. Patented Mar.27,1883.

yklresses, T If k A .L E DE,

(No Model.) 3 Sheets8heet a.

L. J. KNOWLES.

LOOM.

No. 274,502. Patented Mar. 27, 1883.

Wi-TN EssEs INVENTORI UNITED STATES,

Fries.

PATENT LooM.

. '0 SPECIFICATION forming part of Letters Patent No. 274,502, dated March 2'7, 1883. Application filed June 17, 1881. (No model.)

Worcester, in the State of Massachusetts,

have invented certain new and useful Improvements in Looms, of which the following is a specification.

Theinventionrelates to the drivingand brake mechanism of power-looms, more especially of that class ofpower-looms in which the drivingpulley is convertible into a loose pulley; and a part of the invention consists in the combination of a convertible or fast-and-loose driving-pulley with a brake-wheel and brake, the internal mechanism of the driving-pulley for convertin g it from a fast pulley to a loose pnlley being under thedircct control of the brake by means of a. rigid projection therefrom.

The invention consists, further, in the combin ation of a convertible or fast-and-loose drivlug-pulley, a brake and brake-wheel, and suitable mechanism for operating the brake and converting the driving-pulley into a loose pulley, with an ordinary loose pulley and a beltshifting device, the shipper-lever of the latter being under the direct control of the mechanism which operates the brake.

The invention has been embodied in mechanism constructed with especial reference to its operation by the dagger of a weft stop-motion, and accordingly the said mechanism is shown and described in connection with a weft stop-motion, by which it may be operated. The novel features of the weft stop-motion here shown have been described and claimed in my' applications filed December 2,1880, and August 3, 1881, and form no part of the present invention. Any ordinary stop-motion might be substituted for the one here shown.

The invention consists, further, in the novel construction of the fast-and-loose driving-pulley, whereby it may be converted into a loose pulley promptly.

In the drawings, Figure 1 is a plan of so much of a loom asis necessaryv to illustrate the construction and mode of operation of my present invention. Fig. 2 is a section taken on the line A B of Fig. 1. Fig. 3 is an enlarged view section on line av 00 of Fig. 2. Fig. 4 is aseotion on line m as of Fig. 1; and Fig. 5 is a partial .end'elevation of my devices. Figs. 6 and 7 are respectively a side elevation and a section of pulley P.

L is the lay.

B is the breast-beam. F is the loom-frame. S is a rock-shaft in suitable bearings beneath the breast-beam, one of which, q, is shown. This shaft is usually known as the shipperlever shaft, and is herein at times so designated, although in the construction shown the shipper-lever is not rigidly secured to the shipper-lever shaft, as usual, but is pivoted to an independent stud, and is indirectly moved by the shaft. To the said shaft S, near the mid die of the loom, is rigidly secured the knock-off lever t to receive the thrust of the dagger of a weft stop-motion, which will benext described. In the middle of the lay is a slot, 8, while 0 is a bracket or stop-motion frame secured to' the lay in front of the slot. To the lower part of this bracket, at a, is pivoted the dagger d, while the upper part furnishes bearin gs for the fin ger-shaft c, to which are secured a finger or fingers, as shown. rear end of the dagger dare connected by a crank-disk, c, a wrisopimp, and a connectingrod, 1', and accordingly the finger and dagger move together, each in turn partaking of or controlling the motion of the other, but the fingers falling as the point of the dagger rises and rising when the point of the dagger falls. A spring, .9, wound about the pivot a of the dagger, and pressing against a pin, a, in the dagger, tends to throw the point of the dagger u, as shown, and against this guidebar, under the force of the spring 8, presses a horizontal rigid arm, '0, extending from the dagger. This guide-bar uis so inclined for the greater part of its length as to constantly change the direction in which the dagger points during the reciprocating motion of the lay, and this change of position of the dagger causes, by means of the crank-connection above described, a corresponding change in the position of the'fingers. Near the breast-beam the incline of the guiderod is steeper.- 1n the ordinary operation of the loom, when the weft has been properly thrown, the arm n no longer follows the guide bar, for the weft holds upthe fingers and prerents the dagger from rising; but when the weft has not been well thrown, and the fingers fail to find it and fall into the slot s, the arm o follows up the steeper part of the incline or guidebar u and strikes the kn och-off lever and The finger-shaft c and the To the breast-beam B is secured a guide-bar,

automatically operates the belt-shifting mecho jectiug inward, are teeth t.

hereinafter described. 7

SI is the crankshaft, t shaft in the loom to which power is first communicated,P P be} 1ng two pulleys thereon, of which P is an or-' dinary loose pulley, and P a fast-and-loose pul ley of peculiar construction, which will presently be described.

P is a spoked wheel, also upon the shaft S and keyed thereto. It has its periphery struck upon two distinct circles, thus presenting two distinct faces or rims, the larger of which, b, is smooth and serves for a brake-wheel, while the smaller, b has teeth t, which take into the teeth of a larger wheel (not shown) to communicate motion from the shaft S to other parts of the loom. The rim 1) of the wheel P is connected with rim b by arms a, which are curved in such manner as not to interfere with the teeth t.

B is the brake, pivoted to the lower part of the loom-frame at n, and having its upper end shaped, as shown, to fit the smooth rim 1) of the wheel P The pulley P, before mentioned, has upon the side next the wheel P a cylindrical boss or ring, Z, upon the inner face of which, pro- A spring-acted dog, D, pivoted to one of the spokes of the wheel P, has its free end of such shape that it will fit'between two of the teeth t of the ring I of the pulley P. \Vhen the dog is thus held between two of these teeth the wheel P must turn with the pulley P, and the pulleyP is in effect a fast pulley communicating motion to the loom. When the dog is disengaged from the said teeth the pulley P can turn free from the wheel P and is a loose pulley. The dog D is of peculiar construction, and is best shown at Fig. 3, which, as before stated, is an enlarged view taken on line a x of Fig. 2, and in which I) represents the reverse or inside face of the toothed rim of the wheel P whose outer face has already been designated by the same letter. b is a strengthening-rib, and Z the spoke to which the dog D is pivoted, for this purpose the spoke 1 containing a hub, h, which is cast with it, and through which passes the shaft a of the dog, a large slot in the dog permitting it to embrace both ends of the hub. The free end of the dog which engages with the teeth 25 is marked (1. Screwed to the dog is an arm, a, which is normally so held by a spring, a", as to keep the dog engaged with teeth t of the pulley P. The dog has a projection, d, and the brake a corresponding arm or projection,p of such length that it will strike the projection (I just before the brake falls upon the smooth rim 1) of the wheel P H is a stud in the frame, upon which is pivoted a bell-crank lever, J, to the lower and short arm of which is pivoted one end of a connecting-rod, R, hinged at the other end to the brake B The upper and longer arm of the bell-crank lever J carries a roller, m.

To the rockshaft '3, outsidev of the loom. frame and over. the roller m, is rigidly secured a lever, T, the short end of which is so shaped as to form with the roller m a knuckle-joint.

In the normal condition of'the loom the lever T has no efl'ect upon'the bell-crank lever J; but when the rock-shaft S is rocked, which happens when the knock-off lever treceives the thrust of the dagger, the fingersf, having failed to find the weft, the lever T forces down the long arm of the bell-crank lever J, thus pulling forward the-connecting'rod R and op erating the brake B and dog D. The long arm of the lever T permits the knuckle-joint,

above described,'to be operated by hand as well as by the thrust of the dagger. This arm is so shaped as not to interfere with the move- 'ment of a lever, V,'belongin'g to the shuttlebox stop-motion. To the stud H is also piv- "oted the shipping-lever K, held in place by a not or screw, to, and operating an ordinary belt-shifting device, as shown at Fig. 1. This device consists of thelever K, swinging horizontally upon an upright pin, 6 in a projection, H, from the lo'om frame. In the rear end of the leverK' is a slot, 0 through which projects upward a pin, 11, set in a sleeve, K", which has a longitudinal motionon a shaft, 0, projecting from the loom-frame parallel to shaft S. To the sleeve K is attached an ordinary belt-holder, M. A spiral spring wound around the shaft 0 within the sleeve K tends to throw the sleeve outward and place the belt upon the loose pulley P. The foward end of the lever K contains a pin, 0 which works, and normally is locked in a scroll-slot, 0 in the lower end of the shipping-lever K, in the manner described and shown in my Patent No. 198,202. When the upper arm of the shippinglever K is pulled forward to lock the pin 6 in the slot 0 the sleeve K is drawn inward upon the shaftO, and the beltis moved upon the driving-pulley P. When the upper arm is pushed back the sleeve K is thrown out upon the shaft 0 by the spiral spring within the sleeve and upon the shaft, and the beltis shifted to the loose pulley P. The belt is thus shifted by hand; but in order that it may be shifted automatically by the dagger belonging to the weft stop-motion at the time the dagger operates the brake and converts the driving-pulley into a loose pulley, the connecting-rod R has a pro jection, G, which, upon the forward motion of the connecting-rod R upon the fingers failing to find-the weft, as before described, strikes the belt-shipping lever K below the studH at 1. The combination of the fast-and-loose pulley P, the wheel P provided with two rims, (one smooth and the other toothed,) mechanism for interlocking said pulley P and wheel 1, the. brake B ,'and its projecting arm 19*, adapted to disengage said interlocking mechanism, the shaft S, means for actuating said shaft, and intervening mechanism for comm unicating; the movements of said shaft to said brake B substantially as described.

2. The combination of pulley 1?, provided with ring Z and teeth t and the brake-wheel 1, provided with two rims, 1) 11*, teeth t, and i spring-acted dog D, with the brake B and arm and spring-acted dog D, the latter pivoted to t the wheel I and working with the teeth t", substantially as described.

4. The pulleyP, provided with ringland internal" teeth, t wheel P provided with two rims, b N, and spring-acted dog 1), working with the teeth t in combination with the brake B and arm 11 and mechanism for moving the brake, substantially as described.

5. The combination of the loose pulley P, shipping-lever K, and belt-shifting mechanism operated by said lever, the pulley P, provided with ring Z and teeth t brake-wheel P provided with rims b [1 teeth t, and spring-acted dog D, with the brake B provided with the arm 1J2, shaft S, mcanst'or actuating said shaft, and connections between said shaft and said brake, and between said shaft and said shipping-lever, by means of which a rocking ofthe shaft may be communicated to both brake and shipping-lever, substantially as described.

LUCIUS J. KNOYVLES.

\Vitnesses:

H. 0. E1011, 0. M. BENT. 

